package com.etong.citymap.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;

import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;

import com.etong.citymap.activity.R;
import com.etong.citymap.db.util.CityApplication;
import com.etong.citymap.util.log.LogUtil;

public class UpdateManager {

	private Context mContext;
	
	//提示语
	private String updateMsg = "有最新的软件包哦，亲快下载吧~";
	
	//返回的安装包url
	private String apkUrl = "";
	
	
	private Dialog noticeDialog;
	
	private Dialog downloadDialog;
	 /* 下载包安装路径 */
    private static final String savePath = Environment.getExternalStorageDirectory()+"/updatedemo/";
    
    private static final String saveFileName = savePath + "UpdateDemoRelease.zip";

    /* 进度条与通知ui刷新的handler和msg常量 */
    private ProgressBar mProgress;

    
    private static final int DOWN_UPDATE = 1;
    
    private static final int DOWN_OVER = 2;
    
    private int progress;
    
    private Thread downLoadThread;
    
    private boolean interceptFlag = false;
    
    private Handler mHandler = new Handler(){
    	public void handleMessage(Message msg) {
    		switch (msg.what) {
			case DOWN_UPDATE:
				mProgress.setProgress(progress);
				break;
			case DOWN_OVER:
				new InstallApkClass();
//				installApk();
				break;
			default:
				break;
			}
    	};
    };
    
	public UpdateManager(Context context,CityApplication ca) {
		this.mContext = context;
		apkUrl = ca.getHTTPRefreshUrl();
	}
	
	//外部接口让主Activity调用
	public void checkUpdateInfo(){
		showNoticeDialog();
	}
	
	
	private void showNoticeDialog(){
		Builder builder = new Builder(mContext);
		builder.setTitle("软件版本更新");
		builder.setMessage(updateMsg);
		builder.setPositiveButton("下载", new OnClickListener() {			
			@Override
			public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();
				showDownloadDialog();			
			}
		});
		builder.setNegativeButton("以后再说", new OnClickListener() {			
			@Override
			public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();				
			}
		});
		noticeDialog = builder.create();
		noticeDialog.show();
	}
	
	private void showDownloadDialog(){
		Builder builder = new Builder(mContext);
		builder.setTitle("软件版本更新");
		
		final LayoutInflater inflater = LayoutInflater.from(mContext);
		View v = inflater.inflate(R.layout.progress, null);
		mProgress = (ProgressBar)v.findViewById(R.id.progress);
		
		builder.setView(v);
		builder.setNegativeButton("取消", new OnClickListener() {	
			@Override
			public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();
				interceptFlag = true;
			}
		});
		
		downloadDialog = builder.create();
		downloadDialog.setCanceledOnTouchOutside(false);
		downloadDialog.show();
		
		downloadApk();
	}
	
	private Runnable mdownApkRunnable = new Runnable() {	
		@Override
		public void run() {
			try {
				URL url = new URL(apkUrl);
			
				HttpURLConnection conn = (HttpURLConnection)url.openConnection();
				conn.connect();
				int length = conn.getContentLength();
				InputStream is = conn.getInputStream();
				
				File file = new File(savePath);
				if(!file.exists()){
					file.mkdir();
				}else{
					File[] files=file.listFiles();
					for(File file2:files){
						file2.delete();
					}
				}
				String apkFile = saveFileName;
				File ApkFile = new File(apkFile);
				FileOutputStream fos = new FileOutputStream(ApkFile);
				
				int count = 0;
				byte buf[] = new byte[1024];
				
				do{   		   		
		    		int numread = is.read(buf);
		    		count += numread;
		    	    progress =(int)(((float)count / length) * 100);
		    	    //更新进度
		    	    mHandler.sendEmptyMessage(DOWN_UPDATE);
		    		if(numread <= 0){	
		    			//下载完成通知安装
		    			mHandler.sendEmptyMessage(DOWN_OVER);
		    			break;
		    		}
		    		fos.write(buf,0,numread);
		    	}while(!interceptFlag);//点击取消就停止下载.
				
				fos.close();
				is.close();
			} catch (Exception e){
				Toast.makeText(mContext, "空间不够,请清理后在更新", Toast.LENGTH_SHORT).show();
				LogUtil.e(e);
			}
			
		}
	};
	
	 /**
     * 下载apk
     * @param url
     */
	
	private void downloadApk(){
		downLoadThread = new Thread(mdownApkRunnable);
		downLoadThread.start();
	}
	
	class InstallApkClass extends Thread{
		public InstallApkClass() {
			start();
		}
		@Override
		public void run() {
			super.run();
			installApk();
			
		}
	}
	
	
	
	
	 /**
     * 安装apk
     * @param url
     */
	private void installApk(){
		File apkfile = new File(saveFileName);
		File temp=null;
        if (!apkfile.exists()) {
            return;
        }else{
        	try{
        	ZipFile zipFile=new ZipFile(apkfile);
        	ZipInputStream zipInputStream=new ZipInputStream(new FileInputStream(apkfile));
        	ZipEntry zipEntry = null;
        	while ((zipEntry = zipInputStream.getNextEntry()) != null) {
        	            String fileName = zipEntry.getName();
        	             temp = new File(savePath + fileName);
        	            if (! temp.getParentFile().exists())
        	                temp.getParentFile().mkdirs();
        	            OutputStream os = new FileOutputStream(temp);
        	            InputStream is = zipFile.getInputStream(zipEntry);
        	            int len = 0;
        	            byte[] buffer = new byte[1024];  
        	            while ((len = is.read(buffer)) > -1)
        	                os.write(buffer,0,len);
        	            os.close();
        	            is.close();
        	        }
        	        zipInputStream.close();
        	}catch(Exception e){LogUtil.e(e);}
        }
        if(temp!=null){
        	apkfile.delete();
        	Intent i = new Intent(Intent.ACTION_VIEW);
            i.setDataAndType(Uri.parse("file://" + temp.toString()), "application/vnd.android.package-archive"); 
            mContext.startActivity(i);
        }
	}
}
